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October Weather in Ann Arbor, United States

Last updated: June 24, 2025

In October, the average temperature in Ann Arbor, United States hovers around 12°C (54°F). Visitors can expect a range between a chilly -4°C (25°F) and a warm 29°C (85°F). This month typically sees 102 mm (4.0 in) of precipitation spread over 13 days, accompanied by an average humidity of 84%. Make sure to pack accordingly!

October Temperature in Ann Arbor

In October in Ann Arbor, the average temperature is 12°C (54°F). Maximums can reach 29°C (85°F), while minimums can dip as low as -4°C (25°F). This wide temperature range means you should pack accordingly for your travels, ensuring you have both warm and cool weather attire.

October Weather in Ann Arbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Ann Arbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ann Arbor, October typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (85°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec272837476070747266543932
Data source: Temperature data for Ann Arbor generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Ann Arbor

In Ann Arbor in October, precipitation amounts to 102 mm (4.0 in) over the course of 13 days.

October Precipitation Trends in Ann Arbor

The chart displays monthly precipitation patterns in Ann Arbor, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Ann Arbor, October typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec64677789121879772671027753
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Ann Arbor

In Ann Arbor in October, humidity is 84%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky.

October Average Humidity in Ann Arbor

This chart illustrates the average monthly humidity levels in Ann Arbor, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Ann Arbor is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Ann Arbor

In Ann Arbor in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Ann Arbor.

Maximum UV Index Levels in Ann Arbor for October

The chart shows the monthly maximum UV Index (UVI) for Ann Arbor in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Ann Arbor typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
Data source: Ann Arbor October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How October Weather in Ann Arbor Compares to Other Months

Weather in Ann Arbor varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Ann Arbor, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ann Arbor, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)64 mm (2.5 inches)88%low
February Weather-2°C (28°F)67 mm (2.6 inches)87%moderate
March Weather3°C (37°F)77 mm (3.0 inches)85%moderate
April Weather8°C (47°F)89 mm (3.5 inches)86%very high
May Weather15°C (60°F)121 mm (4.8 inches)80%very high
June Weather21°C (70°F)87 mm (3.4 inches)80%very high
July Weather24°C (75°F)97 mm (3.8 inches)80%very high
August Weather22°C (72°F)71 mm (2.8 inches)80%very high
September Weather19°C (66°F)67 mm (2.6 inches)80%high
October Weather12°C (54°F)102 mm (4.0 inches)84%moderate
November Weather4°C (39°F)77 mm (3.0 inches)89%moderate
December Weather0°C (33°F)53 mm (2.1 inches)86%low

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